Help me make a waterfall
For a fluid simulator like the one you want to create you need:


emitter: the mesh where water comes from (choose flow > liquid &amp; inflow)
effector > collision: the mesh that will act as the collision terrain
domain: it's the area where the simulation should run. Emitter and Effector should be inside the domain


The core steps to create the simulation are:


Put all the stuff in place
select the Domain and press the CACHE button
play the animation and check if everything is ok
select the domain, goto Mesh, select it and CACHE MESH
check result and goto 1 to fix settings if you are not happy with the result
apply shader and similar...


here's what I have to share:


here's the source file of my simulation (you need to cache):
https://pasteall.org/blend/5ff62299dac24ba7adec6d04e350173c